Description
In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Python Software Foundation CPython
Default version status: unaffected
0 to < 3.10.22affected3.11.0 to < 3.11.17affected3.12.0 to < 3.12.15affected3.13.0 to < 3.13.16affected3.14.0a1 to < 3.14.0b1affected
References
- https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca ↗
- https://github.com/python/cpython/issues/157190 ↗
- https://github.com/python/cpython/pull/157191 ↗
- https://mail.python.org/archives/list/security-announce@python.org/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/ ↗
- https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3 ↗
- https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d ↗
- https://github.com/python/cpython/commit/197663d63afed27f66e10e23c194e8a634e60913 ↗
- https://github.com/python/cpython/commit/28f315486b3da0352b9a1de1c3c97f4127ba4771 ↗
- https://github.com/python/cpython/commit/c66df4e70435d257fd488b35ea129c6f317433a8 ↗
- https://github.com/python/cpython/commit/cc1689830c6b9aaddded2fb9f2fe8116867e2c0e ↗
- https://github.com/python/cpython/commit/cccc7ec30212dba2abef53ce4a2bed112ddb690c ↗
- http://www.openwall.com/lists/oss-security/2026/09/14/27 ↗